Lindsay Lohan's Asst.Ratted Her Out to Cops... Lindsay WAS Driving!!!

11/7/2012 1:29 PM PST

Lindsay Lohan's Assistant Ratted Her Out to Cops -- Lindsay WAS Driving!!!

EXCLUSIVE

Lindsay Lohan's assistant rolled on her when he spoke to cops after her car accident on Pacific Coast Highway last June, and that's a big reason why she will be prosecuted ... TMZ has learned.

Cops interviewed Lindsay's assistant Gavin shortly after the crash -- at the hospital where Lindsay was being treated -- and according to law enforcement sources, he told police he was riding shotgun when the accident occurred ... and Lindsay was driving.

As you know, Lindsay told cops she was a passenger in her Porsche, but authorities don't believe her and she will be charged with the crime of lying to cops.

Gavin's statement dovetails with the account of the truck driver Lindsay hit -- he also claimed he saw Lindsay behind the wheel.